Estudo microestrutural do catalisador Ni/gama-Al2O3: efeito da adição de CeO2 na reforma do metano com dióxido de carbono

Química Nova

Antoninho Valentini²  Luiz Fernando Dias Probst²  Neftalí L. V. Carreño¹  Edson R. Leite¹  Fenelon M. Pontes¹  Elson Longo¹  Wido H. Schreiner¹  Paulo N. Lisboa-filho¹ 

[1] ,Universidade Federal de Santa Catarina Departamento de Química Florianópolis SC

关键词: methane;    syngas;    Ni/gamma-Al2O3;   

DOI  :  10.1590/S0100-40422003000500005

来源: SciELO

【 摘 要 】

The carbon dioxide reforming of methane was carried out over nickel catalysts supported on the gamma-Al2O3/CeO2 system prepared by wet impregnation. With the increase of the CeO2 weight in the catalyst, a higher stability was observed in the catalytic activity, together with an excellent resistance to carbon deposition and a better Ni dispersion. The catalysts were characterized by means of surface area measurements, TPR, H2 chemisorption, XRD, SEM, EDX, XPS and TEM. An interaction between Ni and CeO2 was observed to the Ni/CeO2 sample after activation in a H2 atmosphere above 300 ºC. Such behavior has a significantly influence on the catalytic activity.

【 授权许可】

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